EP0108195A1 - Device for storing filamentary material - Google Patents

Abstract

The thread 31 is fed tangentially to a rotated storage roll 10 of a thread store 1, while being taken off the roll against the action of a retaining element through a thread guide 4 arranged in prolongation of roll axis 122. The retaining element 14 is formed by a rotatable thread retaining ring which has a thread retaining device 141 which is open radially outwards. The storage roll 10 and the retaining ring 14 have a respective hysteresis discs 105, 143 between which a permanent magnet 150 is arranged on a common drive shaft 12. The thread guide 4 has two separable thread guide members 40, 41 and can bring thread 31 from course 32 to cross the path of the rotating thread retaining device 141. <IMAGE>

Description

The present invention relates to a thread store with a rotary drive and a storage roller which can be driven by this rotary drive, the feed end of which the thread can be fed essentially tangentially from a feed point and from the end of which the thread counteracts the action of a retaining element through a thread guide arranged in an extension of its axis is removable.

Such thread stores are known in a wide variety of designs (DE-OSen 2,555,802 and 2,607,460). The thread is always fed tangentially to the storage roller, loops around it several times and leaves the storage surface in the axial direction between the storage roller and a brake ring placed at the end of the drain, for which purpose the thread must be passed through an annular thread guide. Such thread stores are used in yarn processing machines such as knitting, knitting and weaving machines (DE-OS 2,555,802), but also in yarn-producing machines, in particular open-end spinning machines (DE-OSs 2,553,892 and 2,717,314). Common to these known devices is the disadvantage that the thread has to be laboriously threaded into the brake ring and into the thread guide, which is time-consuming and also requires a stationary arrangement of the thread store if storage is only required temporarily.

The object on which the present invention is based is therefore to create a thread store of the type mentioned at the outset, which makes it possible in a simple manner to apply the thread to the thread store. A further object of the invention is to develop the thread store in such a way that it can only be temporarily brought into the thread path and store the thread without interrupting the thread path.

This object is achieved in that the storage roller has a radially outwardly open drivable retaining element and that the thread guide can be opened and closed. Because the retaining element, which is open radially outwards, can be driven, the thread is always subjected to a retaining force when it is pulled off, which prevents the thread from being pulled off the storage roller in an uncontrolled manner. This retaining force makes it possible to configure the retaining element to be open radially outward, so that there is no need for laborious threading of the thread. Due to the possibility of opening and closing the thread guide, laborious threading is avoided here too. This design of the retaining element and thread guide makes it possible to place an uninterrupted thread on the thread store for temporary storage and then to release it again completely through the thread store.

The driven and radially outwardly open retaining element can be designed differently. According to a mechanically extremely simple embodiment, this consists of the peripheral surface provided with a plurality of openings Storage roller, which openings open into the interior of the storage roller, which in turn is connected to a vacuum source. The negative pressure acting on the thread through the openings in the peripheral surface of the storage roller causes the pulling force exerted on the thread from the discharge side of the storage roller to be opposed by a counterforce which prevents the thread from leaving the storage roller in an uncontrolled manner. The openings are preferably designed as longitudinal slots, which extend essentially over the entire length of the storage roller, since in this way, with simple manufacture, regardless of the position of the individual thread windings collected on the storage roller, they can always be retained well on the storage roller.

In order to improve the retention effect which the openings exert with the aid of the negative pressure acting through them on the thread, in a further embodiment of the device according to the invention it is provided that the retention element formed by the openings additionally comprises an annular bead arranged at the end of the storage roller. By effected thereby additional deflection of the thread it is exposed to an increased friction, so that inadvertent removal of the filament is excluded from the _S peicherwalze even at relatively low negative pressure within the storage roller.

If the thread store is only intended for temporary storage of a limited thread supply, then the thread feed disk, which is conventional in such thread stores, can be omitted. Instead, it can be provided that the storage roller opposite the thread feed point and the thread guide is adjustable in the axial direction. As a result, each new turn is neatly deposited next to the turn previously stored on the storage roller. The feed movement of the thread store with the storage roller - or also the storage roller in the thread store - can be controlled with the aid of means which also bring the thread store from a rest position into a working position.

The drive of the storage roller must be elastic, so that the drive speed of the storage roller can be adapted to the tensions of the fed and the withdrawn thread. This can be done using a torque motor, for example. For this purpose, the storage roller can preferably be driven via a slip clutch.

According to a preferred embodiment of the subject matter of the invention, the retaining element is formed by a thread retaining ring which can be driven relative to the storage roller, instead of by the openings in the peripheral surface of the storage roller. This eliminates the need for a special vacuum connection for the storage roller, which also leads to a reduction in noise. To reduce the friction values between the thread and thread retaining ring and to increase the service life of the thread retaining ring, the latter advantageously consists of plastic.

A fill monitoring function is expediently assigned to the storage roller, which takes over the control of further devices depending on the circumstances determined by the application. For example, the drive of the thread store can be stopped, or the speed of a subsequent thread take-up point (e.g. bobbin) is increased (see e.g. DE-AS 2.706.018).

The retaining element is expediently formed by a thread retaining ring that can be driven elastically relative to the storage roller, with the thread retainer of which the thread is engaged and to which a rotation monitoring device is assigned, wherein a device for determining the direction of rotation of the thread retaining ring is also provided, which together with the rotation monitoring device with a pulse counter is connected in terms of tax, which can be switched over depending on a change in the direction of rotation of the thread retaining ring from up to down and vice versa. The thread retaining ring, which can be driven relative to the storage roller, remains at the same take-off and delivery speeds; if the delivery speed of the thread to the storage roller exceeds the withdrawal speed of the thread from the storage roller, the thread retention ring rotates in the direction of rotation of the storage roller, while if the withdrawal speed is greater than the delivery speed, the thread retention ring rotates counter to the rotation direction of the storage roller. The degree of rotation of the thread retaining ring thus indicates how much thread is stored on the storage roller. For this reason, the rotation monitoring device is used to determine how much the thread retaining ring has rotated, while the device for determining the direction of rotation of the thread retaining ring detects whether the thread supply on the storage roller is increasing or decreasing. Depending on the direction of rotation of the thread retaining ring, the pulse counter therefore adds or subtracts the pulses received by the rotation monitoring device, so that the stored number of pulses is directly related to the stored thread supply. This device for measuring the thread length stored on the storage roller can be used not only in a thread store of the type described with radially outwardly open retaining elements, but also in retaining elements designed in the form of eyelets or having eyelets. The pulse counter is preferably connected in terms of control to the drive of a take-off device in order to avoid that certain minimum or maximum amounts on the storage roller are undershot or exceeded.

The take-off device is expediently formed by a thread take-up point which is arranged downstream of the storage roller in the thread running direction and which not only the winding device but also a yarn processing point, e.g. a knitting or weaving machine.

If a thread connecting device is connected downstream of the thread storage device in order to correct thread breaks or to eliminate irregularities in the thread, the thread guide arranged in the extension of the axis of the storage roller is expediently assigned to the thread storage device and the thread connecting device. In this way, the thread connecting device can be arranged very close to the thread store, which results in a compact design.

In a further embodiment of the subject matter of the invention, the device for determining the direction of rotation of the thread retaining ring can be formed by a thread connecting device arranged between the storage roller and the thread take-up point, which is connected in terms of control to the drive of the thread take-up point. As long as the thread connecting device is working, the thread must stand still in its working area, so that the thread take-up device is stopped. A subsequent thread is thus only wound up on the storage roller. When the thread connecting device is finished with its work, it puts the thread take-up point back into operation. In a winding device, the thread take-up speed is usually because of the anyway necessary tension delay is higher than the delivery speed of a thread to the storage roller, so that the latter is emptied again. So that this emptying does not take too long, a control device connected to the pulse counter is advantageously provided for controlling the speed of the thread take-up point as a function of the thread length located on the storage roller.

In order to prevent the storage roller from overfilling, the pulse counter can be connected to a stopping device.

In order to make the beginning of the storage even easier, it is expediently provided that the storage roller has a thread retainer which is open radially outwards at its end of discharge. This can be designed or stored in different ways. According to an expedient embodiment of the subject matter of the invention, it is seated in the storage roller. In this case, the thread retainer is advantageously elastically loaded radially inward, while an axially displaceable adjusting cone is provided in the storage roller, which can be brought into action on the inner end of the thread retainer. To reduce the friction between the adjusting cone and the thread retainer, the thread retainer can be guided against rotation in the storage roller and, at its inner end, can carry a wheel oriented in the circumferential direction of the storage roller to support the thread retainer on the adjusting cone.

An embodiment of the subject matter of the invention has proven to be extremely advantageous, in which the storage roller extends beyond its end in the form of a ver Young truncated cone continues, on the outer surface of which the thread retainer is arranged. By changing the orientation of the thread store to the thread run, by changing the distance between the thread store and the subsequent thread guide or by a relative movement of the thread retainer to the truncated cone, it can be achieved that the thread retainer is on one path crossing the thread run, the other Times from this and the path of the thread drawn from the thread storage is not obstructed. The arrangement of the thread retainer in the immediate vicinity of the larger diameter of the truncated cone is particularly advantageous, since in this way, by arranging the thread store relative to the shell run in such a way that the shell line and thread run take an essentially parallel course, the thread through the surface line of the truncated cone relatively slightly superior thread retainer can be easily removed. The thread can be picked up by changing the thread path or by changing the position of the thread retainer relative to the thread path. For this purpose, the thread retainer is preferably seated in the peripheral surface of the truncated cone.

If a thread retaining ring is used as a retaining element, the thread retaining element is preferably part of this thread retaining ring which can be driven relative to the storage roller. In order to obtain simple drives for the storage roller and the thread retaining ring, these are advantageously both connected to a common drive shaft via a slip clutch, both the storage roller and the thread retaining ring expediently each carrying a hysteresis disc and a permanent magnet arranged on the common drive shaft between these two hysteresis discs is.

In an advantageous embodiment of the subject matter of the invention, the thread retainer is designed as a hook which has an open throat in the drive direction, it being possible for the thread retainer to carry a ceramic insert in its throat to increase the service life.

If for some reason the thread store does not have to work continuously, as is the case, for example, with open-end spinning devices, the thread store is located in such a position that the thread run is in no way influenced by the deflection. In this case, the thread guide is expediently designed as a thread feeder which brings the thread from the predetermined thread path into a thread path crossing the path of the rotating thread retainer, the thread guide advantageously consisting of two thread guide parts which can be removed from one another.

If a thread break occurs without the thread delivery to the thread store being interrupted, this leads to an overfill of the thread store. If the thread store is only used for a temporary storage of the thread and then releases the thread, which then returns to a normal, ie not deflected, thread run, the thread relaxes temporarily. For these cases - that is, taking up the length of yarn supplied or due to relaxation - the mouth of a suction pipe is arranged in a further embodiment of the subject of the invention in the vicinity of the yarn path of the yarn fed to the storage roller. If such a thread break occurs after the thread store, for example in the thread connecting device due to failure of the thread connecting process, it is expedient to avoid overfilling the thread store if a thread monitor is in the thread run after the thread connecting device is arranged, which is connected in terms of control to the device for producing and / or delivering the thread. In order not only to prevent the subsequent delivery of the thread to the thread store, but also to be able to empty the thread store, the thread monitor is advantageously connected in a further embodiment of the subject matter of the invention in terms of control to the rotary drive of the storage roller, the rotary drive being reversible in its direction of rotation.

If the thread store is not always required, but only for certain work phases, then according to the invention it is provided in a textile machine with a plurality of work stations and a maintenance device passing these work stations, which can optionally be assigned to these work stations, that the storage roller and the thread run in can be brought to an acute angle to one another in such a way that the outlet end of the storage roller is closer to the thread path than its feed end.

The thread store designed according to the invention allows an extremely versatile application. So it can be used in all known applications, for example in weaving, knitting and warp knitting machines, but also in open-end spinning devices, as before. The preparation of the work, in which the thread is brought to the predetermined thread path, is made considerably easier here, since the thread can be threaded into the thread store without an open thread end having to be available for this. Rather, in the embodiment of the thread store according to the invention, it is possible to insert the continuous thread into the thread store from the side. This opens up completely new uses for the thread store, since such a thread store can now also be used when it should only be sent to the job for a short period of time for a specific work phase. Outside of this work phase, the thread store can therefore assume any standby position in the vicinity of the work station or else on a maintenance device which has to look after a large number of work stations of the same type. As a result, considerable space and material savings are achieved, in particular if the thread store is to be used on machines with a large number of similar workplaces, for example on an open-end spinning machine.

• Figur 1 eine erste Ausführung eines erfindungsgemäß ausgebildeten Fadenspeichers im Schnitt in einer nur im Ausschnitt und schematisch dargestellten Offenend-Spinnmaschine mit einer Fadenverbindungsvorrichtung;
• Figur 2 eine Frontansicht auf den in Figur 1 gezeigten Fadenspeicher unter Weglassung der für die Erläuterung verzichtbaren Elemente sowie auf die dem Fadenspeicher zugeordnete Fadenführung;
• Figur 3 ein Detail aus Figur 2; und
• Figur 4 eine andere Ausführung des erfindungsgemäßen Fadenspeichers, wobei der Fadenspeicher in der oberen Hälfte der Abbildung im Querschnitt und in der unteren Hälfte in der Seitenansicht dargestellt ist.

The invention is discussed in more detail below with reference to drawings, in which only the elements that are absolutely necessary for understanding the invention are shown. Show it:

• Figure 1 shows a first embodiment of a thread store designed according to the invention in section in an open-end spinning machine shown only in detail and schematically with a thread connecting device;
• FIG. 2 shows a front view of the thread store shown in FIG. 1, omitting the elements that are not necessary for the explanation, as well as the thread guide assigned to the thread store;
• Figure 3 shows a detail from Figure 2; and
• Figure 4 shows another embodiment of the thread store according to the invention, the thread store being shown in cross section in the upper half of the figure and in a side view in the lower half.

The thread store 1, which is shown in FIGS. 1 and 4, can in principle be used on all textile machines on which thread store 1 with a storage roller 10 is used, for example on knitting and knitting machines or also on weaving machines. However, since the working conditions on an open-end spinning machine are even more difficult compared to the aforementioned machines, especially if the thread store 1 is to be arranged on a movable maintenance device 2, the structure and function of the thread store 1 are explained below using the example of an open-end spinning machine.

In FIG. 1, of an open-end spinning machine of this type, only the spinning device 3 indicated by a square, a pair of draw-off rollers 30 and a winding device 6 are shown. A thread 31 produced in the spinning device 3 is drawn off from the spinning device 3 with the aid of the pair of draw-off rollers 30 and then fed to the winding device 6, where the thread 31 is wound onto a sleeve to form a bobbin.

The maintenance device 2, which can be moved along the open-end spinning machine and thus can operate a large number of spinning positions of this machine in succession, is brought in a known manner for this operation into the thread path between the pair of draw-off rollers 30 and the thread take-up point designed as a winding device 6. The winding device 6 is assigned a drive device (not shown) which can be controlled by the maintenance device 2. In addition, in the exemplary embodiment shown, the maintenance device 2 has a pair of auxiliary extraction rollers 20 which is driven by a motor 21 via a belt 22.

The maintenance device 2 has, in addition to the thread run 32 in the thread running direction defined by the draw-off roller pair 30 of the open-end spinning machine and the auxiliary draw-off roller pair 20 of the maintenance device 2, the thread store 1 already mentioned and a thread connecting device 23, which can be designed differently, for example as a knotting device.

The thread store 1 shown in FIG. 1 has a base 11, with the aid of which it is mounted on the maintenance device 2 rigidly or pivotably on a lever or linkage. The base 11 in turn has a hub 110 in which a drive shaft 12 is mounted via one or more bearings 111. With the aid of a bearing 100, the already mentioned storage roller 10 is mounted on the shaft 12, which has driving slots 102 on its feed end 101 facing the base 11. A thread feed disk 13 is toothedly engaged with these drive slots 102, which is rotatably mounted on the hub 110 of the base 11 with the aid of a bearing 130 and is thus carried along by the storage roller 10 when the latter is rotated. The thread feed disk 13 is inclined in a known manner with respect to the axis 122 of the storage roller 10 formed by the drive shaft 12 in order to effect the required thread feed.

The base 11 has a cylindrical jacket 112, which partially envelops the thread feed disk 13 on its circumference, but on the other hand allows it to protrude beyond the end face of the jacket 112 to such an extent that it can exert the required feed action on the thread.

A rotary drive 120 is connected to the shaft 12, which is designed as a motor according to FIG. 1, but other drives - e.g. Gears that are driven by other driven elements - find application. This rotary drive 120 is carried by the base 11 of the thread store 1. At its free end, the drive shaft 12 carries an end plate 121 which rotates together with the shaft 120 at the same speed.

According to FIG. 1, a retaining element designed as a thread retaining ring 14 is rotatably mounted on the shaft 12 with the aid of a bearing 140 between the end plate 121 and the storage roller 10. The thread retaining ring 14 covers with a short circumferential surface 142 both the outlet end 103 of the storage roller 10 and the outer periphery of the end plate 121 in order to exclude the risk of the thread 31 becoming trapped between the thread retaining ring 14 and the storage roller 10 on the one hand and the end plate 121 on the other.

A part of the thread retaining ring 14 is shown in FIGS. 2 and 3. As can be seen from this, the thread retaining ring 14 has a plurality of thread retainers 141 on its circumference, but a single one of these types may be sufficient. Thread retainer 141. The thread retainer 141 is or the thread retainer 141 is designed to be open radially outward so that a thread 30 can be brought into the engagement area of the thread retainer 141 from the outside. According to FIGS. 2 and 3, the thread retainer 141 has the shape of a hook that has an open throat 144 in the drive direction 145 (see FIG. 2) of the thread retainer ring 14. To protect against wear, this throat 144 according to FIG. 3 is equipped with a ceramic insert 146.

The bearing 100 of the storage roller 10 is arranged at a distance from its outlet end 103, so that the storage roller 10 encloses a space 15 with a radial wall 104 together with the thread retaining ring 14. A permanent magnet 150 is arranged on the drive shaft 12 in this space 15 at a distance from the radial wall 104 and also from the thread retaining ring 14. The storage roller 10 carries a hysteresis disk 105 on the side of its radial wall 104 facing the permanent magnet 150, while the thread retaining ring 14 carries a hysteresis disk 143 on its side facing the permanent magnet 150. The two slip clutches designed as hysteresis clutches are thus driven by the shaft 12 via a single permanent magnet 150.

An extension of the axis 122 of the thread store 1 formed by the drive shaft 12 is a thread guide 4, which consists of two thread guide parts 40 and 41 which are movable relative to one another. According to FIG. 1, the thread guide part 40 is carried stationary by the maintenance device 2, while the thread guide part 41 is movably carried by the maintenance device 2. According to Figure 2, both thread guide parts 40 and 41 are fork-shaped, wherein the thread guide part 41 is pivotally mounted on the pivot axis 42. By means of a swivel drive, not shown, the thread guide part 41 can be brought from a ready position 410 into the shown closed position, whereby it detects the thread 31 following the thread run 32 and takes it into the position shown in FIG. 2, in which the thread 31 between the thread guide parts 40 and 41 is included and guided.

The storage roller 10 is assigned a rotation monitoring device which comprises a button 50 which scans the thread retaining ring 14. This is connected to a pulse counter 5, with which the thread connecting device 23 is also connected in terms of control. The pulse counter 5 is in turn connected to the motor 21 of the auxiliary take-off roller pair 20 via a control device 51.

The mouth 240 of a movable suction tube 24 is arranged in the vicinity of the thread run 33 between the pair of draw-off rollers 30 and the thread store 1, while the mouth of a suction tube 26 is arranged in the vicinity of the thread run after the auxiliary take-off roller pair 20.

Between the thread connecting device 23 and the auxiliary take-off roller pair 20 there is a thread monitor 25 which is connected via a control device 250 to the rotary drive 120 of the thread store 1 and to a delivery device for feeding a sliver to be broken down into individual fibers to the spinning device 3. Furthermore, a thread deflection device 27 is located between the thread monitor 25 and the winding device 6.

• Während des normalen, ungestörten Spinnprozesses wird der in der Spinnvorrichtung 3 erzeugte Faden 31 von dieser durch das Abzugswalzenpaar 30 abgezogen und der Spulvorrichtung 6 zugeführt. Tritt ein Fadenbruch auf, so wird die Wartungsvorrichtung 2 in bekannter Weise zu der betreffenden Spinnstelle gerufen, wo sie den Fadenbruch behebt. Der angesponnene Faden 31 wird anschließend bei stillstehender Spulvorrichtung 6 durchtrennt, wobei der sich zur Spulvorrichtung 6

erstreckende Fadenabschnitt über die Fadenumlenkvorrichtung 27 hinweg dem sich in der Position 241 befindlichen Absaugrohr 24 zugeführt wird, der diesen Fadenabschnitt somit gespannt hält. Der andere, durch die Spinnvorrichtung 3 laufend nachgelieferte Fadenabschnitt wird in das Hilfsabzugswalzenpaar 20 eingelegt und dem Absaugrohr 26 zugeführt und dort laufend abgesaugt.The device described above in construction works as follows:

• During the normal, undisturbed spinning process, the thread 31 produced in the spinning device 3 is drawn off by the pair of draw-off rollers 30 and fed to the winding device 6. If a thread break occurs, the maintenance device 2 is called in a known manner to the relevant spinning station, where it corrects the thread break. The spun thread 31 is then severed when the winding device 6 is at a standstill, the thread forming the winding device 6

extending thread section is fed across the thread deflection device 27 to the suction pipe 24 located in position 241, which thus holds this thread section under tension. The other thread section continuously supplied by the spinning device 3 is inserted into the auxiliary take-off roller pair 20 and fed to the suction pipe 26 and continuously suctioned off there.

The thread store 1 is here with its axis 122 at an acute angle to the thread run 32, the outlet end 103 being closer to the thread run 32. The rotary drive 120 of the thread store 1 drives the storage roller 10 and the thread retention ring 14 via the shaft 12, the permanent magnet 150 and the hysteresis disks 105 and 143, which follow this drive movement unhindered. The speed of drive shaft 12, storage roller 10 and thread retaining ring 14, which initially rotate synchronously, is chosen so that the peripheral speed of the storage roller 10 is higher than the speed at which the thread 31 is drawn off by the pair of take-off rollers 30 from the spinning device 3.

Now the thread guide part 41 is brought from its ready position 410 into the closed position shown, in which the thread section extending to the pair of auxiliary draw-off rollers 20 is enclosed between the thread guide parts 40 and 41. This thread section comes into the path of the rotating thread retainer 141, which is prevented from further circulation by this thread section, which is held taut by the auxiliary pulling roller pair 20 rotating at the same speed as the pulling roller pair 30 becomes. However, the storage roller 10 rotates at an undiminished speed. The thread section is initially further drawn off by the pair of auxiliary draw-off rollers 20 and discharged by the suction tube 26 following this pair of auxiliary draw-off rollers 20.

The other thread section, which extends from the winding device 6 to the mouth 240 of the suction tube 24, is guided so that it does not get into the thread store 1.

The two thread sections to be connected are guided in the manner described by the thread deflection device 27 and the suction tube 24 or by the thread guide 4 and the auxiliary take-off roller pair 20 in parallel, so that they can be securely received by the thread connecting device 23 for thread connection.

As long as the thread connecting device 23 has not yet started its work, the thread retaining ring 14 of the thread store 1 acts like a thread compensation element. If the thread tension temporarily decreases a bit, the thread retaining ring 14 rotates in the drive direction 145 and thereby causes a certain wrap around the storage roller 10, which is released again when the thread tension rises again - for example after the thread connection has ended.

The thread connecting device 23 then begins its work, the thread sections to be connected to one another having to be stopped. The thread connecting device 23 stops the motor 21 via the control device 5, so that the auxiliary draw roller pair 20 is also stopped. That of the spinning device 3 also produced and subsequently delivered through the discharge roller pair 30 filament section thus relaxes, so that the yarn retainer 141, the yarn had this section detected previously, now b _e - starts also to cycle. The subsequent length of thread thus arrives at the storage roller 10 and is deposited there, the thread feed disc 13 in a manner known per se from the feed end 101 of the storage roller 10 to the end of the storage roller 103 so far that the new turns always between can store the existing turns and the thread feed disc 13.

At the beginning of the storage work, the storage roller 10 is slowly reduced to the thread delivery speed, which is predetermined by the speed of the draw-off roller pair 30. The thread retaining ring 14 with the thread retainer 141 also follows this speed change, since only fluctuations on the outlet side of the thread store 1 lead to relative movements between the storage roller 10 and the thread retaining ring 14. However, since no thread is withdrawn from the thread store 1 during thread connection and since the thread guide 4 is in the extension of the axis 122 of the thread store 1, so that no tension changes occur from the thread run-off side of the thread store 1, the thread retaining ring 14 and the storage roller 10 rotate synchronously. Since the location of the thread feed to the thread store 1 is a fixed point, the revolutions of the thread retaining ring 14 represent a measure of the thread supply located on the storage roller 10. Therefore, the revolutions of the thread retaining ring 14 can be used to measure the thread on the storage roller 10 stored thread quantity serve. For this reason, the storage roller 10 is assigned the rotation monitoring device, the button 50 of which essentially contains a light source and a photocell or is designed as an induction button. The _D rehüberwachungsvorrichtung thus detected photoelectrically or inductively past the gears of the or of the yarn retainer _141, as long as the yarn splicing device 23 performs its work.

During the storage of thread 31 on the thread store 1, a thread excess, which occurs briefly due to the start or end of work of the thread connecting device 23, can also be stored by the thread store 1, the thread retaining ring 14 briefly running in relation to the storage roller 10 in the drive direction 145, which Also detected by the rotation monitoring device and registered in the form of pulses from the pulse counter 5.

When the two thread sections extending to the thread store 1 and the winding device 6 are connected by the thread connecting device 23, the thread ends extending to the suction pipe 24 and the suction pipe 26 are separated and suctioned off.

When the thread connecting device 23 has finished its work, it issues a corresponding control command to the winding device 6 via the control device 51, which now begins its winding work again. As a result of the winding tension, the thread reserve accumulated on the thread store 1 is reduced. By the tax given by the thread connecting device 23 to the control device 51 impulse is changed to count down as pulse counter 5. The thread connecting device thus fulfills the task of a device for determining the direction of rotation of the thread retaining ring 14, since when the thread 31 is pulled off the storage roller 10, the thread retaining ring 14 is rotated by the pulled thread 31 against the drive direction 145 of the storage roller 10. By comparing the pulses emitted when the thread retaining ring 14 is turned back with the number of pulses emitted during the previous rotation in the drive direction 145, it can thus be determined whether the stored thread reserve has been used up or not. When the pulse counter has reached zero again, it changes over so that it counts up again the next time it is saved.

Such a device for measuring the filling state of the storage roller 10 with the aid of a pulse counter has the advantage that it works independently of the thread speed, the thread thickness, the speeds of the thread store and the dimensions of the thread store. This also applies regardless of the storage period. The degree of filling of the thread store 1 is determined solely by the number of rotations of the thread retaining ring 14 in the winding direction (= drive direction 145).

So that the thread reserve cannot be pulled off the storage roller 10 in an uncontrolled manner, the thread 31 must always be kept under tension. This is done by the thread retaining ring 14 driven by the permanent magnet 150 and the hysteresis disk 143. It is therefore only possible to pull the thread 31 off the storage roller 10 to the extent that there are differences in the delivery speed to the thread store 1 - caused by the rotational speed of the Pull-off roller pair 30 is given - and the take-off speed from the thread store 1 - which is given first by the speed of rotation of the auxiliary take-off roller pair 20 and later by the winding speed of the winding device 6 or by the absence of a take-off while the thread connecting device 23 is working - tension differences occur in the thread 31. Due to the elastic coupling - permanent magnet 150 and hysteresis disc 143 - the occurring voltage peaks are immediately absorbed by changes in the circulation of the thread retaining ring 14. The thread retaining ring 14 with its thread retainer 141 thus acts as a retaining element, which only allows the amount of thread, which corresponds to the actual excess speed of the predetermined take-off speed relative to the feed speed, to leave the storage roller 10.

After the thread store 1 has been emptied, the maintenance device 2 can leave the spinning station and drive to another spinning station in order to carry out its work there again.

The device described above with reference to a preferred embodiment can undergo numerous modifications depending on the application.

For example, the rotary drive 120 does not need to have its own drive motor, but the shaft 12 can be driven via appropriate ratios from any rotating part of the maintenance device 2 suitable for this purpose, if provided, or from the machine. Instead of a common permanent magnet 150 for driving the storage roller 10 and the thread retaining ring 14, two separate, spatially separate permanent magnets can also be provided, so that they act as slip clutches Trained drive couplings for the storage roller 10 and the thread retaining ring 14 are completely independent of each other. The necessary torques and powers of the hysteresis clutches (hysteresis disc 143 and permanent magnet 150 as well as hysteresis disc 104 and permanent magnet 150) must be selected according to the circumstances and, if necessary, adjusted by changing the distance between hysteresis disc 143 or 104 and permanent magnet 150. In such a case, separate permanent magnets, adjustable on the drive shaft 12, for the two hysteresis disks 143 and 104 are particularly advantageous. It is also possible to provide eddy current or fluid clutches instead of hysteresis clutches, it also being conceivable to provide separate drives, for example torque motors, for the storage roller 10 and the thread retaining ring 14.

The thread retaining ring 14 can also be driven via a friction clutch from the storage roller 10, a felt bearing etc. being used as the friction clutch. A drive of the thread retaining ring 14 independently of the storage roller 10 has the advantage, however, that thread tension drops occurring on the side downstream of the thread store 1 can be compensated for by the thread retaining ring 14, based on the thread path.

However, the drive described with reference to FIG. 1 is particularly advantageous since it is extremely compact, does not require any electrical lines reaching into the interior of the thread store 1 and can even compensate for thread tension drops occurring after the thread store 1.

The thread retaining ring 14 can also be designed differently and can also be made of different materials. So it is useful, but not in all Cases required if the thread catcher (s) 141 are designed as hooks, since in this way a particularly rapid pick-up of the thread 31 is ensured by the thread retainer 141 crossing the thread run 34. If a thread retainer 141 designed as a hook is provided, its throat 144 is open in the direction of rotation 145 predetermined by the direction of rotation of the rotary drive 120, since the thread 31 is thereby held particularly securely both when winding onto the thread store 1 and when it is being pulled off the thread store 1 and is led.

The thread retention ring 14 can be made of metal and can be protected by ceramic inserts 146 in the area of the throats 144 of the thread retainer 141. It is also possible to provide 146 small wheels instead of ceramic inserts, the axis of which is oriented in such a way that the wheels can rotate in the direction of the thread, whereby the friction is reduced. However, a thread retaining ring 14 made of plastic is particularly advantageous since the thread retaining ring 14 should have the lowest possible moment of inertia due to the need to be able to accelerate the thread retaining ring 14 quickly when the memory begins. To increase the wear resistance of a thread retaining ring 14 made of plastic, this can be coated, e.g. Chromium-plated thread retainer 141, which not only increases the service life, but at the same time reduces the sliding values between thread 31 and thread retainer ring 14.

The openable and closable thread guide 4 can also be designed differently. In particular for thread stores 1, which are used on knitting and knitting or also weaving machines, the thread guide 4 can be designed be sufficient, the eyelet shape has a circular arc-shaped section which is held elastically in contact with the circular arc-shaped rest of the thread guide 4 and can be opened by hand or automatically against the action of a spring. The illustrated embodiment of a divisible thread guide 4 with two thread guide parts 40 and 41 which can be removed from one another is particularly advantageously suitable as a thread feeder with which the thread 31 is pivoted or also pushed by the movable thread guide part 41 into the position in extension of the axis 122 of the thread store 1 can be brought between the two thread guide parts 40 and 41. However, it is also possible to arrange the thread store 1 in a suitable manner for the thread run 32 to ensure that the thread 31 crosses the path of the thread retainer 141 without the aid of a thread feeder and - possibly with the aid of the thread retainer 141 - into the correspondingly controlled thread guide 4 reached. This thread guide 4 can also be arranged in a thread connecting device 23 arranged in the thread running direction after the thread storage device 1 in such a way that it is not only assigned to the thread storage device 1, but also to the thread connecting device 23 and the thread 31 of this thread connecting device 23 in a manner such as this is necessary for the later work of the thread connecting device 23.

The device for determining the thread circulation direction can also be designed differently. In the previously described embodiment, this is formed by the thread connecting device 23, since the thread store 1 increases or reduces the stored thread supply depending on its work. However, it is also possible to assign a pair of buttons to the thread retaining ring 14 or the storage roller 10, which in determines in a known manner in which direction the thread runs. Such a pair of buttons also enables a precise determination of the point in time at which the thread changes its direction of rotation. The winding device 6 can thus be switched on very smoothly, so that the direction of rotation of the thread also changes with a delay relative to the working end of a thread connecting device 23, but without any falsifications in the value stored by the pulse counter 5.

Depending on the application of the thread store 1, filling monitoring can also be omitted. In this case, it is sufficient to switch on from the thread connecting device 23 a timer which measures the working time of the thread connecting device 23 and, depending on this time, emits a signal that the thread store 1 is now empty. For this purpose, the timing element can be preset differently so that different times for thread connection, different thread delivery and withdrawal speeds, different tensioning delays including sufficient security etc. can be taken into account during this time.

But even if filling monitoring is provided, it can be designed differently. As described using the example in FIG. 1, a pulse counter 50 is provided there, which determines by counting up and down whether the storage roller 10 is filled or emptied. Instead, it can also be provided that the thread feed disc 13 is acted upon elastically in such a way that it actuates a switch when thread turns are present and releases this switch when the thread turns are released - that is, when the storage roller 10 is empty - by the action of the loading force. Or it is one extends the drive slots toward the drain end of the storage roller 10 and receives an arm that is normally pushed outward beyond the circumferential surface of the storage roller 10 by the action of a spring. However, if a thread supply is stored on the storage roller 10, the thread turns cover this elastically mounted arm and press it radially inward against the action of the spring. This elastically mounted arm is part of a switch or actuates it, so that - as in the example described with reference to the thread feed disk 13 - a filling monitoring is also provided here.

Eg during storage on a swivel arm, by means of which the thread store at least two adjacent work stations can be assigned or, even when stored on a past traveling at a plurality of work stations _W ar- processing device - in particular when the yarn storage 1 several work stations can be sequentially assigned 2 - it is advantageous if the thread store 1 is quickly emptied again and can therefore be removed from this job very soon. For this purpose, the control device 51 shown in FIG. 1 is not only able to switch the motor 21 and the winding device 6 on and off, but is also designed as a speed control. This speed control, which - as shown - is connected to the pulse counter 5 (or a differently designed filling monitor and the thread connecting device 23), receives a signal from the thread connecting device 23 to stop the auxiliary take-off roller pair 20 and the winding device 6 when the work begins Rotation monitoring device 50 now registers the circulation of the thread retaining ring 14. When the thread connection process is completed, this is also signaled by the thread connecting device 23 to the control device 51, which now commands the winding device to pull the thread 31 off the storage roller 10 at an increased speed. Shortly before the storage roller 10 is completely emptied, the pulse counter 5 sends a corresponding signal to the control device 51, which now reduces the speed of the winding device 6, for example temporarily increased by 30%, to the normal production speed. This takes place in a graded manner or continuously in such a way that the use of the stored thread reserve coincides with the normal winding speed being reached.

For example, the control device 51 has a digital / analog converter, which converts the number stored by the pulse counter 5 into an analog value. This analog value controls the speed of the winding device, and by means of a corresponding design of the control device 51 it can be achieved that a predetermined maximum value is never exceeded. This maximum value is a target value, which thus characterizes the highest winding speed. The actual value, which must be compared with this, results from the sum of the value characterizing the normal winding speed and the analog value derived from the pulse counter 5. If this sum (actual value) is lower than the target value, it determines the speed of the winding device 6, while if this actual value exceeds the target value, the target value determines the speed of the winding device 6. In this way, a smooth speed transition of the winding device 6 to the normal winding speed can be achieved.

The suction tube 24 holds the thread section extending to the winding device 6 during the thread connection. It. it is also possible that the suction tube 24 first fetches the thread section from the winding device 6 or a transmission device which has removed the thread from the winding device 6. However, during the thread connecting work, or at least at the beginning of this work, when the thread connecting device 23 picks up the thread section, the mouth 240 of the suction tube 24 assumes the position 241 shown in broken lines, but then moves into the position shown in FIG. 1 with a solid line. In this position, the suction pipe 24 fulfills the task of collecting the thread 31 released by the thread store 1 when it is emptied, which thread 31 now temporarily assumes the thread path 35. Due to the normal tension delay when winding, this thread excess is used up practically without significant tension fluctuations, so that the quality of the turns on the bobbin is not impaired.

If the thread connection process has failed, this is determined by the thread monitor 25. The latter then immediately interrupts the supply of the thread 31 to the thread store 1 and for this purpose is controlled by the control device 250 with the device for producing (spinning device 3) or for delivering the thread 31 (take-off device for pulling the thread from a spool, for example in a yarn processing or yarn treating machine) in connection. The subsequent delivery of the thread 31 to the thread store 1 is thus prevented. It is now necessary to free the storage roller 1 from its thread 31 in order to avoid excessive amounts of storage. Of course, this can be done by hand. In the embodiment shown, the thread monitor 25 is instead via the control device 250 additionally connected to the rotary drive 120 of the thread store 1. If a thread break is now registered after the thread connecting device 23, not only is the subsequent delivery of the thread 31 to the thread store 1 prevented, but at the same time the direction of rotation of the storage roller 10 is reversed by reversing the direction of rotation of the rotary drive 120, so that the suction pipe 24 opens up the storage roller 10 stored and can usually pull up to the thread connecting device 23 thread 31 and remove.

The thread store 1 can also be emptied in other ways. For example, the thread guide 4 has a pair of rollers (not shown) with a pressure roller that can be lifted off, which pulls the thread off the thread store 1 when a thread break occurs and feeds it to a further suction device, not shown.

If a thread break has occurred, a command is given after emptying the thread store 1 so that the maintenance device 2 can repeat the unsuccessful piecing process.

As shown and discussed, the thread store 1 is in a position inclined to the thread run 32 at an acute angle, since it is then easiest to feed the thread 31 to the thread store 1. Other arrangements of the thread store 1 to the thread run 32 are also possible, however, if it is ensured by appropriate stationary or movable thread guides that the thread 31 can be brought into a path crossing the thread retainer 141.

In the case of a stationary arrangement of the thread store 1, i.e. if during the work of the device to which it is assigned, e.g. the thread feed point of a knitting machine, always remains in the operating position and always carries a certain amount of stored thread, a thread catcher is not necessary, since the thread 31 is then applied to the thread store 1 by hand for the first time and then the appropriate measures are taken to ensure that the stored Thread quantity does not exceed certain minimum or certain maximum quantities.

The pulse counter 5 can control various processes, depending on what type of machine the thread store 1 is used in. For example, when a certain value is reached, a device assigned to it, e.g. stop the delivery device of a spinning device 3. This is e.g. Expedient if several successive attempts to connect the thread 31 to the thread connecting device 23 have failed, since otherwise the thread store 1 would overfill. Similarly, it may be necessary to stop a knitting machine when the pulse counter 5 has reached a certain value, since this indicates an error in the thread flow.

The pulse counter 5 can also be connected in terms of control to the drive of a trigger device. This is the case in the example described above, in which the take-off device is formed by the winding device 6. However, it is also conceivable that this take-off device is formed by a knitting machine or the like or else by the thread store 1 itself if the take-off device 31 pulls the thread 31 from a supply spool and is not supplied with the aid of a pair of take-off rollers 30. In this case, the drive device 120 is stopped, so that the thread store 1 can no longer take up a thread. An exemplary embodiment of a thread store 7, which can be designed both with and without a thread catcher 8, is explained below with reference to FIG. In the following description, the reference symbols used there are also used for the elements which are unchanged from the corresponding elements from FIG. 1.

The thread store 7 according to FIG. 4 is shown in section in the upper half of the figure, but is shown in a side view in the lower half of this figure.

Like the thread store 1 shown in FIG. 1, the thread store 7 also has a base 11, with the aid of which the thread store 7 is mounted in a suitable manner, for example in a maintenance device 2, in order to remain in the example of an open-end spinning machine. In the hub 110 of the base 11, a shaft 12 is in turn supported by means of a bearing 111, with which the storage roller 70 is connected in a rotationally fixed manner at one end. The other end of the drive shaft 12 is connected to a rotary drive 120 (see Figure 1, e.g. torque motor or other motor with an intermediate slip clutch), so that the storage roller 70 is driven in dependence on the resistance of the thread 31 to it.

In the example shown in FIG. 4, the storage roller 70 has driving slots 102 on its feed end 101 facing the base 11, which, in contrast to the embodiment shown in FIG. 1, are sealed on the inside of the storage roller by an inserted ring 71. The thread feed disk 13 engaging in these driving slots 102 is - likewise in contrast to the embodiment according to FIG. 1 - supported on its outside in the jacket 112 of the base with the aid of a bearing 113.

The storage roller 70 has at its outlet end 1.03 an annular bead 72 which merges into a tapered truncated cone 73. Over the entire storage length 74, i.e. between the feed end 101 and the discharge end 103, the storage roller 70 has a plurality of uniformly distributed openings 75 on its circumferential surface, which are formed as longitudinal slots in the embodiment shown. However, a corresponding number of cylindrical bores, which are distributed over the storage length 74 in such a way that the stored thread 31 is always in the area of influence of at least one such opening 75, can be used, these openings 75 then advantageously being located on lines which loop around the storage roller 70 in a helical fashion.

A tubular section 76 adjoins the base 11 on the side facing away from the storage roller 70, into which the suction air nozzle 77 opens into a suction air line connected to a vacuum source (not shown). The section 76 is connected to the interior 78 of the storage roller 70 via bores 760 in the base 11.

When the thread store 7 is in operation, vacuum is present at the suction air nozzle 77, which acts through the bores 760 and the openings 75 through to the outside of the storage roller 70, since the interior of the thread store is otherwise sealed off from the outside (see ring 71). . If thread 31 is now placed on the storage length 74 of the storage roller 70, which is driven by a rotary drive 120 which enables slipping, the negative pressure sucks in the thread 31 and holds it in place. If the thread 31 is to be withdrawn again from the storage roller 70 at a later point in time, these openings 75 and this one act on the thread 31 acting negative pressure as a retaining element for the thread 31. To increase this retaining effect of the thread 31 on the storage roller 70, the storage length 74 of the storage roller 70 is limited on its outlet side 103 by the mentioned annular bead 72 as an additional measure in the exemplary embodiment shown, since this one creates additional deflection for the thread 31 and thus additional friction surfaces for the thread to be drawn off. Compared to an embodiment of such a thread storage device 7, the back-painting element of which is formed by openings 75 under suction air, but does not have such an annular bead 72, the retention effect is even better.

Fadenrückhalter 8 nur während seiner Fangarbeit arbeitet,

ansonsten das Abziehen des Fadens vom Fadenspeicher 7

behindert, ist dieser so ausgebildet und in der Speiotherwalze 70 gelagert, daß er in der Speicherwalze 70 verseenkt werden kann und die Oberfläche der Speicherwalze 70 nicht mehr überragt.In order to also be able to automatically feed the thread 31 to the storage roller 70 when the thread store 7 is configured in this way, a thread retainer 8 is also provided here. In contrast to the embodiment according to FIG. 1, in which the thread catcher 141 can execute a movement relative to the storage roller 10, the thread retainer 8 is always carried along by the storage roller 70 during its rotational movement. In order to

Thread retainer 8 only works while it is catching,

otherwise, pulling the thread from the thread store 7

disabled, it is designed and stored in the Speiotherwalze 70 that it can be sunk in the storage roller 70 and no longer projects above the surface of the storage roller 70.

The thread retainer 8 must also be open to the outside here, where - as shown in the example of FIGS. 2 and 3 - all hook-shaped thread catchers can also be used.

According to a structurally simple and therefore preferred embodiment, which is described using the example of FIG. 4, a truncated cone 73 is connected on the side of the annular bead 72 facing away from the storage length 74 of the storage roller 70, the largest diameter of which corresponds to the diameter of the annular bead 72 and is increasing tapered towards its free end. In this truncated cone 73, a bushing 80 for receiving the thread retainer 8, which comprises a retaining pin 81, is mounted in the vicinity of the annular bead 72. The retaining pin 81 carries a plate 82 within the sleeve 80, on the side facing the outside of the truncated cone 73 of which a compression spring 83 is supported, which in turn is supported on the outer bottom 84 of the sleeve 80. To limit the stroke, a further bottom 85 of the bushing 80 is provided on the side facing the interior 78 of the thread storage device 7, against which the plate 82 rests when the inner end of the catch pin 81 is released.

In the feed roller 70, an axially displaceable adjusting cone 9 is guided, which carries a support disk 90, which serves on the one hand to support the feed roller 70 and with which, on the other hand, several drive bolts 91 are connected, which are distributed uniformly over their circumference and are connected by correspondingly distributed holes 114 in the base 11 secured against rotation. The drive bolts 91 are connected at their end facing away from the support disk 90 to a suitable lifting drive (not shown), for example a lifting magnet, a pneumatically or hydraulically actuated lifting piston, etc.

The actual cone 92 is located on the side of the support disk 90 facing the truncated cone 73, which cone is displaced along the drive shaft 12 of the thread store 7 can be brought to act on the retaining pin 81 or releases it again. Since the storage roller 70 and the drive shaft 12 rotate while the adjusting cone 9 is not rotating, suitable bearings can of course be provided between the adjusting cone 9 and the storage roller 70 on the one hand and between the adjusting cone 9 and the drive shaft 12 on the other hand.

If, by a suitable movement of the thread guide 4 (FIG. 1) or the thread store, it is achieved that the path of the retaining pin 81 and thread run 32 intersect, the cone 92 becomes in contact with the actuation of the lifting drive (not shown) via the drive bolts 91 the inner end of the retaining pin 81 or - if a plurality of retaining pins 81 are provided - brought to the inner ends thereof. As a result, the retaining pin or pins 81 are pushed out of the surface of the truncated cone 73 of the storage roller 70 against the action of the compression springs 83 assigned to them. The thread 31 is Eicher ^p roller during rotation of the S 70 of the retention pin 81 or one of them detected and thereby causes the winding of the yarn 31 on the yarn storage. 7 During the time in which the withdrawal of the thread 31 from the thread store 7 has not yet been interrupted, the thread 31 is wound onto the storage roller 70 as quickly as is pulled off, so that it initially remains with a single turn.

In order to ensure that this one turn does not occur until the thread 31 in the area after the thread storage device 7 has stopped, it is expedient for the device which stops the thread take-off in the area of the thread connecting device 23 to also the linear actuator of the actuating cone 9 is actuated. Thus, when using a thread store 7 instead of the thread store 1 in an open-end spinning device according to FIG. 1, it is provided that the thread connecting device 23 controls the lifting magnet for the drive bolts 91. If the lifting magnet drops when the work of the thread connecting device 23 has ended, the cone 92 is withdrawn from the catch pin 81, which now releases the thread 31. However, due to the negative pressure acting in the openings 75, the thread 31 is retained on the surface of the storage roller 70 until an increased tension, which the winding device 6 exerts on the thread 31, pulls it off the storage roller 70 exactly as required.

In a simple embodiment of the device, it is sufficient to keep the wear thereof within acceptable limits by appropriate choice of material and by the choice of shape for the inner end of the retaining pin 81. To increase the service life, however, it can also be provided that the retaining pin 81 - for example by non-round shape of the retaining pin 81 itself or its plate 82 and a corresponding guide through the socket 80 or its bottoms 84 and 85 - is secured against rotation and on its inside End carries a wheel 86, which is oriented in the circumferential direction of the storage roller 70 and rolls on the cone 90 when it comes into contact with the wheel 86.

The retention pin 81 can of course also be driven in a radial direction in a different manner than shown. For example, the inner end of the retaining pin 81 has a drive foot which is in a radial (not shown) wall of the storage roller 2 in one of two parallel ones Guideways is guided, wherein the drive foot of the retaining pin 81 can be transferred from one to the other guideway by an adjustable switch. The switch can be operated mechanically or electromagnetically. The two guideways are arranged concentrically to one another and only have switches, with the aid of which the drive foot can get from the inner to the outer guideway. If the drive foot is in the inner guideway, the retaining pin 81 is countersunk in the peripheral wall of the truncated cone 73, if the drive foot is located in the outer track, the catch pin projects beyond the peripheral wall of the truncated cone.

4, it is in principle possible to arrange the thread retainer 8 also at the cylindrical end of the storage length 74 of the storage roller 70 or on the circumference of the annular bead 72, so that the truncated cone 73 is not required. However, it has been shown that the arrangement of the catch pin 81 in the truncated cone 73, in particular in the vicinity of its largest diameter, is particularly advantageous, since then by arranging the thread store 7 relative to the thread run 32 in such a way that the surface line of the truncated cone 73 is essentially parallel to the thread run and in the immediate vicinity thereof, the thread 31 can be caught by a relatively short retaining pin 81 and thus by a relatively short stroke of the adjusting cone 9, even if the thread guide 4 is not designed as a thread feeder.

Instead of a retractable retaining pin 81 in the truncated cone 73, it can also be provided that this truncated cone 73 has a - non-controllable - thread catcher on its outer surface and this by shortening the axial distance between thread storage 7 and thread guide 4 is brought into the area of the thread run 32. Here, the thread store 7 - or possibly only the storage roller 70 - is also adjusted relative to a feed point (pair of take-off rollers 30). It is therefore also possible to continue this movement even after the thread 31 has been caught in order to be able to deposit the thread 31 side by side on the storage roller 70 without the aid of a thread feed disc 13, so that the thread feed disc 13 can also be omitted.

In a device according to FIG. 4, too, it can be determined in a simple manner with the aid of a filling monitor having a pulse counter whether the storage roller 70 is still carrying thread windings or is empty. When the thread 31 is wound up, the amount of thread stored can be measured at the passages of the retaining pin 81 - in the same way as was described using the example of FIG. 1. When the thread is pulled off the storage roller 70, the thread revolutions on the ring bead 72 can be counted, which are opposite to those of the ring bead, which is made possible with a corresponding choice of material for the storage roller 70 and thread 3 ₁ with different reflection properties.

If, for example in the case of knitting machines, the delivery of the thread 31 to the thread store 1 _b or 7 is interrupted when a thread break occurs, the suction tube 24 can also be omitted, while the suction tube 26 is not required anyway in the case of knitting machines.

The said yarn store 1 and 7 respectively associated auxiliary devices are therefore ^p only when using the yarn Eicher 1 and 7, in specific machines or devices available, while others can omit them. For example, the thread monitor 25 is not required in all applications because, for example, the fill monitoring can interrupt the subsequent delivery of the thread 31 to the thread store 1 or 7 in the event of a thread break after the thread store 1 or 7. Nevertheless, the thread store 1 or 7 also has the advantage that the running or uninterrupted thread 31 can be applied to the thread store 1 or 7 and stored there at any time, but on the other hand the thread 31 can also be returned from the thread store at any time without interruption of its thread travel 1 or 7 can be removed. As a result, the thread store 1 or 7 opens up a wealth of application areas and is not limited to the application examples discussed at an open-end spinning station, on a knitting machine, a knitting machine or a weaving machine, but can be used anywhere in the textile industry where it is to compensate for temporary thread tension fluctuations and the need to take up temporarily accumulating excess thread material in such a way that it can be fed directly to a thread take-up point when the temporarily stored thread quantity is used up. The thread take-up point here is to be understood as a yarn processing point, for example a knitting, knitting or weaving point, but also a thread collecting point, for example the winding device 6.

Further modifications of the subject matter of the invention by exchanging elements with one another or by equivalents and combinations thereof fall within the scope of the present invention.

Claims (34)

1. thread store with a rotary drive and a storage roller that can be driven by this rotary drive, the feed end of which the thread can be fed essentially tangentially from a feed point and the end of which the thread can be pulled against the action of a retaining element through a thread guide arranged in an extension of its axis, characterized in that the storage roller (10, 70) has a radially outwardly drivable retaining element (14 - 70, 75, 72) and that the thread guide (4) can be opened and closed. _2nd Thread store according to claim 1, characterized in that the retaining element (70, 75) is formed by the peripheral surface of the storage roller (70) provided with a plurality of openings (75), which openings (75) into the interior (78) of the storage roller ( 70) open, which in turn is connected to a vacuum source (77). 3. Thread store according to claim 2, characterized in that the openings (75) are designed as longitudinal slots which extend substantially over the entire length of the storage (74) of the storage roller (70). 4. Thread store according to claim 2 or 3, characterized in that the retaining element (70, 75, 72) comprises an annular bead (72) arranged at the outlet end (103) of the storage roller (70). 5. Thread store according to one or more of claims 1 to 4, characterized in that the storage roller (10, 70) relative to the thread feed point (30) and the thread guide (4) is adjustable in the axial direction. 6. Thread store according to one or more of claims 1 to 5, characterized in that the storage roller (10, 70) via a slip clutch (105, 150) can be driven. 7. thread store according to claim 1 or 6, characterized in that the retaining element is formed by a relative to the storage roller (10) drivable thread retaining ring (14). 8. Thread store according to claim 7, characterized in that the thread retaining ring (14) consists of plastic. 9. Thread store according to one or more of claims 1 to 8, characterized in that the storage roller (10, 70) is assigned a fill monitoring. 10. thread store with a rotary drive and a storage roller that can be driven by this rotary drive, the feed end of which the thread can be fed essentially tangentially from a feed point and from the end of which the thread can be pulled against the action of a retaining element through a thread guide arranged in an extension of its axis, In particular according to claim 1, characterized in that the retaining element is formed by a thread retaining ring (14) which can be driven elastically relative to the storage roller (10), with the thread retainer (141) of which the thread (31) is engaged and which is associated with a rotation monitoring device, and that a device for determining the direction of rotation (23) of the thread retaining ring (14) is provided, which, together with the rotation monitoring device, is connected to a pulse counter (5) which, depending on a change in the direction of rotation of the thread retaining ring from counting up to counting down d is reversible. 11. Thread store according to claim 10, characterized in that the pulse counter (5) is in control with the drive of a take-off device (1-6) in connection. ₁ 2. thread store according to claim 11, characterized; that the take-off device is formed by a thread take-up point (6) arranged in the thread running direction after the thread store (1). 13. Thread store according to one or more of claims 1 to 12, with a thread connecting device connected downstream of the thread store, characterized in that the thread guide (4) is assigned to the thread store (1, 7) and the thread connecting device (23) together. 14. Thread store according to one or more of claims 9 to 13, characterized in that the device for determining the direction of rotation of the thread retaining ring (14) is formed by a thread connecting device (23) arranged between thread store (1) and thread take-up point (6), which in terms of tax is connected to the drive of the thread take-up point (6). 15. Thread store according to one or more of claims 12 to 14, characterized by a speed control (51) connected to the pulse counter (5) for controlling the speed of the thread take-up point (6) as a function of the thread length located on the storage roller (10). 16. Thread store according to one or more of claims 9 to 15, characterized in that the fill monitoring is connected to a stop device. 17. Thread store according to one or more of claims 1 to 16, characterized in that the storage roller (10, 70) at its outlet end (103) has a radially outwardly open thread retainer (141 - 8). 18. Thread store according to claim 17, characterized in that the thread retainer (8) in the storage roller (70) is mounted retractable. 19. Thread store according to claim 18, characterized in that the thread retainer (8) is acted upon elastically radially inwards and that an axially displaceable adjusting cone (9) is also provided in the storage roller (70), which on the inner end of the thread retainer (8 ) can be brought into effect. 20. Thread store according to claim 19, characterized in that the thread retainer (8) is guided against rotation in the storage roller (70) and at its inner end in the circumferential direction of the storage roller (70) oriented wheel (86) for supporting the thread retainer ( 8) on the adjusting cone (9). 21. Thread store according to one or more of claims 17 to 20, characterized in that the storage roller (70) continues beyond its outlet end (103) in the form of a tapered truncated cone (73), on the lateral surface of which the thread retainer (8) is arranged is. 22. Thread store according to claim 21, characterized in that the thread retainer (8) is arranged in the immediate vicinity of the larger diameter of the truncated cone (73). 23. Thread store according to claim 22, characterized in that the thread retainer (8) in the peripheral surface of the truncated cone (73) is retractable. 24. Thread store according to claim 17, characterized in that the thread retainer (141) is part of a thread retainer ring (14) which can be driven relative to the storage roller (10). _25th Thread store according to claim 24, characterized in that both the storage roller (10) and the thread retaining ring (14) are each connected to a common drive shaft (12) via a slip clutch (143, 150-105, 150). 26. Thread store according to claim 25, characterized in that both the storage roller (10) and the thread retaining ring (14) each carry a hysteresis disc (105, 143) and on the common drive shaft (12) between these two hysteresis discs (105, 143) a permanent magnet (150) is arranged. 27. Thread store according to one or more of claims 13 to 26, characterized in that the thread retainer (141) is designed as a hook which has an open throat (144) in the drive direction (145). 28. Thread store according to claim 27, characterized in that the thread retainer (141) carries a ceramic insert (146) in its throat (144). 29. Thread store according to one or more of claims 13 to 28, characterized in that the thread guide (4) is designed as a thread feeder, the thread (31) from a predetermined thread path (32) in a the path of the rotating thread retainer (141 - 8) brings crossing threadline. 30. Thread store according to claim 29, characterized in that the thread guide (4) consists of two removable thread guide parts (40, 41). 31. Thread store according to one or more of claims 1 to 30, characterized in that the mouth (240) of a suction pipe (24) is arranged in the vicinity of the thread run (33) of the thread (31, 70) fed to the storage roller (10, 70). 32. Thread store according to one or more of claims 1 to 31, with a thread connecting device arranged downstream of the thread store and with a device for producing and / or delivering a thread, characterized in that a thread monitor (25) is arranged in the thread run after the thread connecting device (23) which is connected in terms of control to the device (3) for producing and / or delivering the thread (31). 33. thread store according to claims 31 and 32, characterized in that the thread monitor (25) is connected in terms of control with the rotary drive (120) of the storage roller (10, 70), which rotary drive (120) is reversible in its direction of rotation. 34. Thread store according to one or more of claims 1 to 33, for a textile machine with a plurality of work stations and a maintenance device passing by these work stations, which can optionally be assigned to these work stations, characterized in that the storage roller (10, 70) and The thread path (32) can be brought to one another at an acute angle (ole) in such a way that the outlet end (103) of the storage roller (10, 70) is closer to the thread path (32) than its feed end (101).

Images